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fix/workaround for SPI too fast#2

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sylvandb wants to merge 16 commits intorsbohn:masterrsbohn/ArduinoISP:masterfrom sylvandb:mastersylvandb/ArduinoISP:masterCopy head branch name to clipboard

+313-198

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Commits on Jan 27, 2012

• implement bitbang SPI for slow clock devices, cleanup SPI pin handling

  

  Sylvan Butler

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Commits on Feb 10, 2012

• add Lady Ada's PWM clock on pin 9

  

  Sylvan Butler

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• eliminate unneeded variables, use correct variable types, big cleanup

  

  Sylvan Butler

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Commits on Feb 13, 2012

• simplify both spi_send()

  

  Sylvan Butler

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Commits on Feb 25, 2012

• disable interrupts before programming timer1

  

  Sylvan Butler

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• Don't start_pmode if we're already in pmode. -- without baudrate change

  

  Sylvan Butler

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• Set error if GET_SIGN_ON not followed by CRC_EOP

  

  Sylvan Butler

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Commits on May 31, 2013

• Use SPI lib for the USE_SPI case

  

  Peter Van Hoyweghen

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  Peter Van Hoyweghen

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• factor bit bang code in a (minimal) class mimicing the one from SPI lib

  

  Peter Van Hoyweghen

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  Peter Van Hoyweghen

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• rm last references to AVR SPI regs, set new defaults: USE_SPI=yes, LADYADA_CLOCK=no (don't break existing ArduinoISP shields)

  

  Peter Van Hoyweghen

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  Peter Van Hoyweghen

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• compile for Due: introduce SPI_CLOCK_DIV_MAX; error if LADYADA_CLOCK is selected (not yet implemented)

  

  Peter Van Hoyweghen

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  Peter Van Hoyweghen

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Commits on Jun 2, 2013

• reset target before driving SCM or MOSI, reset sequence as in AVR datasheets under "Serial Programming Algorithm"

  

  Peter Van Hoyweghen

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  Peter Van Hoyweghen

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• introduce SERIAL_PRG to flexibly select which serial port to use for programming; on Due, SerialUSB will be used by default (does not autoreset)

  

  Peter Van Hoyweghen

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  Peter Van Hoyweghen

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• add TRACE macro's (printf debugging on second uart)

  

  Peter Van Hoyweghen

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  Peter Van Hoyweghen

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Commits on Jun 4, 2013

• rename USE_SPI to USE_HARDWARE_SPI; by default don't use hardware spi on Due

  

  Peter Van Hoyweghen

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  Peter Van Hoyweghen

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Commits on Jun 5, 2013

• Merge pull request #1 from PeterVH/due

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  sylvandb

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